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MockLoggerForExtensionTests.cs
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MockLoggerForExtensionTests.cs
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using System;
using Microsoft.Extensions.Logging;
using Moq;
using moqforlogs;
using Xunit;
namespace moqforlogs.tests
{
public class MockLoggerForExtensionTests
{
[Fact]
public void Should_Verify_When_Logging_For_Info_Was_Called()
{
// arrange
var expValue = 1;
var fakeLogger = Mock.Of<ILogger<LogConsumer>>();
var sut = new LogConsumer(fakeLogger);
// act
sut.DoSomethingAndLogInfo(expValue);
// assert
var mockLogger = Mock.Get<ILogger<LogConsumer>>(fakeLogger);
mockLogger.VerifyInfoWasCalledWith($"Before operation with Value: {expValue}");
mockLogger.VerifyInfoWasCalledWith($"After operation with Value: {expValue}");
}
[Fact]
public void Should_Verify_When_Logging_For_Debug_Was_Called()
{
// arrange
var expValue = 1;
var fakeLogger = Mock.Of<ILogger<LogConsumer>>();
var sut = new LogConsumer(fakeLogger);
// act
sut.DoSomethingAndLogDebug(expValue);
// assert
var mockLogger = Mock.Get<ILogger<LogConsumer>>(fakeLogger);
mockLogger.VerifyDebugWasCalledWith($"Before operation with Value: {expValue}");
mockLogger.VerifyDebugWasCalledWith($"After operation with Value: {expValue}");
}
[Fact]
public void Should_Verify_When_Logging_For_Error_Was_Called()
{
// arrange
var expValue = 1;
var fakeLogger = Mock.Of<ILogger<LogConsumer>>();
var sut = new LogConsumer(fakeLogger);
// act
sut.DoSomethingAndLogError(expValue);
// assert
var mockLogger = Mock.Get<ILogger<LogConsumer>>(fakeLogger);
mockLogger.VerifyErrorWasCalledWith($"Before operation with Value: {expValue}");
mockLogger.VerifyErrorWasCalledWith($"After operation with Value: {expValue}");
}
[Theory]
[InlineData(LogLevel.Information)]
[InlineData(LogLevel.Debug)]
[InlineData(LogLevel.Error)]
public void Should_Verify_When_Logging_Multiple_Log_Kinds(LogLevel testLevel)
{
// arrange
var fakeLogger = Mock.Of<ILogger<LogConsumer>>();
var sut = new LogConsumer(fakeLogger);
// act
sut.DoManyLogTypesOfCertainLogLevelKind(testLevel);
// assert
var mockLogger = Mock.Get<ILogger<LogConsumer>>(fakeLogger);
mockLogger.VerifyLogLevelMeetsCallCount(testLevel, 1);
}
[Fact]
public void Should_Verify_When_Logging_Multiple_Log_Kinds_Multiple_Times()
{
// arrange
var expLogCount = 3;
var fakeLogger = Mock.Of<ILogger<LogConsumer>>();
var sut = new LogConsumer(fakeLogger);
// act
sut.DoManyLogTypes(expLogCount);
// assert
var mockLogger = Mock.Get<ILogger<LogConsumer>>(fakeLogger);
mockLogger.VerifyLogLevelMeetsCallCount(LogLevel.Information, expLogCount);
mockLogger.VerifyLogLevelMeetsCallCount(LogLevel.Debug, expLogCount);
mockLogger.VerifyLogLevelMeetsCallCount(LogLevel.Error, expLogCount);
}
[Fact]
public void Should_Verify_No_Logs_Were_Called()
{
// arrange
var expLogCount = 0;
var fakeLogger = Mock.Of<ILogger<LogConsumer>>();
var sut = new LogConsumer(fakeLogger);
// act
sut.DoManyLogTypes(expLogCount);
// assert
var mockLogger = Mock.Get<ILogger<LogConsumer>>(fakeLogger);
mockLogger.VerifyNoLogsWereCalled();
}
[Fact]
public void Should_Verify_Only_DebugLogs_Were_Called()
{
// arrange
var expLogCount = 5;
var fakeLogger = Mock.Of<ILogger<LogConsumer>>();
var sut = new LogConsumer(fakeLogger);
// act
sut.DoManyLogTypesOfCertainLogLevelKind(LogLevel.Debug, expLogCount);
// assert
var mockLogger = Mock.Get<ILogger<LogConsumer>>(fakeLogger);
mockLogger.VerifyOnlyDebugLogsWereCalled();
}
[Fact]
public void Should_Verify_Only_InfoLogs_Were_Called()
{
// arrange
var expLogCount = 5;
var fakeLogger = Mock.Of<ILogger<LogConsumer>>();
var sut = new LogConsumer(fakeLogger);
// act
sut.DoManyLogTypesOfCertainLogLevelKind(LogLevel.Information, expLogCount);
// assert
var mockLogger = Mock.Get<ILogger<LogConsumer>>(fakeLogger);
mockLogger.VerifyOnlyInfoLogsWereCalled();
}
[Fact]
public void Should_Verify_Only_ErrorLogs_Were_Called()
{
// arrange
var expLogCount = 5;
var fakeLogger = Mock.Of<ILogger<LogConsumer>>();
var sut = new LogConsumer(fakeLogger);
// act
sut.DoManyLogTypesOfCertainLogLevelKind(LogLevel.Error, expLogCount);
// assert
var mockLogger = Mock.Get<ILogger<LogConsumer>>(fakeLogger);
mockLogger.VerifyOnlyErrorLogsWereCalled();
}
}
}